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Prunur
205724

COPYRIGHT 1902
BY THE TRIBUNE ASSOCIATION.

FOR CONTENTS AND INDEX SEE END OF VOLUME,

ASTRONOMICAL CALCULATIONS.

(Prepared by S. Hart Wright, M. D., A. M., Ph. D., Penn Yan, N. Y.) Five eclipses for 1902, as follows: I. Partial of the sun, April 8, of less than one digit, seen only in the Arctic Ocean. IL Total of the moon, April 22, seen in Asia, Europe and Africa,

III. Partial of the sun, May 7, of about ten digits, seen in New Zealand and in part of the Pacific Ocean.

IV. Total of the moon, October 16-17, visible generally in the United States.

V. Partial of the sun. October 31, of eight digits, seen in Europe and Asia. Lunar Eclipse, Oct. 16–17 Intercolonial. | Eastern. | Central, Mountain Pacific.

H. M.

H. M. H. M. H. M. H. M. Eclipse begins...

. O 17 mo. 11 17 ev. 10 17 ev. 9 17 ev. 8 17 ev. Total begins.....

19 mo. [ 0 19 mo. 11 19 ev. 10 19 ev. 19 M iddle.....................4

2 3 mo.

1 3 mo. 03 mo.11 3 | Total ends..... 2 48 mo. 1 48 mo. 048 mo.

| 10 48 ev. Partial ends................ 3 50 mo. 1 2 50 mo. | 1 50 mo. | O 50 ev. / 11 •Evening Phases on 16th. Morning Phases on 17th.

ECLIPSE OF MOON OCTOBER 16-17.

N .

11 48

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No. 1. first contact. No. 2. first six digits. No. 3, total and middle. No. 4. last six digits. No. 5, last contact. N is north point of the moon No. 1 is 86° east; No. 5. 1180 west of it.

Note-The line from the moon's centre to N points to the North Star always.

SUPERIOR PLANETS EAST OR WEST OF THE SUN,

.........East | Mars, after March 29........... Jupiter, until Jan. 15..and after Aug. 5. East Jupiter, from Jan. 15 to Aug. 5......West Saturn, until Jan. 9, and after July 17. East Saturn, from Jan. 9 to July 17... ... West Uranus, from June 10 to Dec. 14.. ... East | Uranus, until June 10 and after Dec. 14, West THE SEASONS.

MORNING AND EVENING STARS. H.M

Venus from Feb. 14 to Nov. 28 will be Winter begins 1901, Dec.

7 1 Mo. a morning star, and it will be an evening Spring begins 1902, March

8 Mo. star to Feb. 14 and after Nov. 28. Summer begins 1902, June 22 9 6 Mo. Mercury, evening star, from Jan. 2 to Autumn begins 1902. Sept. 23 6 40 Ev. Feb. 18; April 28 to June 23; Aug 11 to Winter begins 1902, Dec 22 1 19 Ey. Oct. 19, and after Dec. 12. Mercury,

morning star, Feb. 18 to April 28; June 23

to Aug. 11; Oct, 19 to Dec. 12.

PLANETS BRIGHTEST. Mercury, Feb 1 to 3 and Sept. 25 to 30. after sunset; also March 11 to 15 and Nov. 4 to 7, rising before the sun. Venus, Jan. 5 ann March 21. Mars, not this year. Jupiter, Aug. 5. Saturn, July 17. Uranus, June 10.Neptune, Dec. 24. Jupiter will be in Capricornus after March 16. Saturr will be in Sagittarius all the year, and Uranus in Scorpio all the year.

ERAS.
The Mahometan year 1320 begins April 10
The Jewish year 5663 begins October 2.
The Japanese year 2562 is 1902 A. D.
The Olympian year 2678 begins in July, 1902.

NOTE.-The times of the lunar eclipse of October 16-17, the moon's pheses and the tides for three ports are given in Standard Time, used by railroads, and the tides the standard used at the ports is that for the 75th meridian. For all other computations in the Almanac true mean solar time is used. Standard time, being artificial, cannot be used for such without much confusion and some error, besides being very impracticable where solar time is needed.

The antecassiopestial longtitolaris on

Day....

33°

AZIMUTH TABLE OF POLARIS, OR NORTH STAR, 1902. : The surveyor may find the true north by observing Polaris either when it crosses the meridian or is at the greatest eastern or western elongation. The latter plan is prefenble to the former, but it calls for a knowledge of the azimuth of the star, which is not uniform for all seasons and latitudes. Hence the table given herewith. If one knows approximately the time when the elongation will be reached, he can follow the star with his transit until it ceases to muve further to the eastward (or westward). Then, by reading his compass and applying the correction for azimuth, he will get the variation of the needle. In case of doubt it may be wise to repeat the observation a night or two later.

The eastern elongation is the one to use from early May to the middle of October, and the western will serve for all but a few W.cks of the remainder of the year. In 1902 Polaris will be at its eastern elongation on May 10, at about 4:17 a. m.; May 16, 3:54 a. m.; June 1, 2:61 a, m.; June 16, 1:52 a. m.; July 1, 12:54 a. m.; July 16, 11:55 eve.; August 1, 10:58 p. m.; August 16, 9:54 p. n.; September 1, 8:51 p. m.; September 16, 7:52 p. m.; October 1, 6:53 p. m.; October 16, 5:50 p. m. The western elongation occurs on October 16, at about 5:40 a. m.; November 1, 4:37 a. m.; November 16, 3:38 a. m.; December 1, 2:39 a. m.; December 16, 1:40 a. m.; January 1, 12:36 morn.; January 16, 11:36 eve.; February 1 10:37 p. m.; February 15, 9:34 p. m.; March 1, 8:43 p. m.; March 16, 7:44 p. m.; April 1, 6:40 p. m. The event occurs four minutes earlier each night than on the preceding one.

From the closing days of March until May 10 Polaris will be on the meridian, and hence in the true north, when a plumb line will cover it and 38 Cassiopeæ simultaneously. The latter is a star of the sixth inagnitude, some 20 degrees distant from the Pole Star. Delta Cassiopeæ, some 10 degrees further away, but brighter, is approximately in the same celestial longtitude, but 38 Cassiopeæ corresponds much more precisely. It wili be directly under Polaris on April 1, at about 12:47 a. m.; April 16, 11:49 p. m.; May 1, 10:49 p. m., and May 10, 10:14 p. m. AZIMUTH OF POLARIS (NORTH STAR) FOR 1902, WHEN AT ITS GREATEST ELONGATION, EAST OR WEST, FOR THE LATITUDE AND DATES GIVEN.

l Polar
Dist. I I
Lat. | Lat.

Lat.
Month, of Po-

359
laris.
"
M .

911 39 14/1 42 38 January ..1 11 12 3411 22 5711 24 4011 26 3211 28 351 30 5211 33 23 57

51 January ..11

13 January (2)

57 February February 59

26 February

13 17 March 39

58

16 March

481 March

511 April

471

32 April

51

371 43 April ..

661 May May

9 1 27 1 May

121

27 June

29 1 34

49
June
June
July
July
July

16 August .

29 1 33 59 481 August ..

46 August ... 21 1 12

241

431
Septemb'r.
Septemb'r.
111
20

54
11

39
Septemb'r.
16 1 24 58 511 28 551

36 October ... 461

31/1 42 55 October ...

45

33
October ...
391

411
301

44 November

341 22 59 November

35 28

19 November 21 27

31

141

29 December.

24
28 20 24

101 35 56

24 December 11 22 171 21

53 1 38 581 December . 21 23

55 December. 1311 12 1811 22 401 24 21 1 26 13 11 28 1611 32 1 33 21 35 48 1 38 5211 42 15

38

32 321

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